Short answer: the JBL Partybox Encore Essential. It ranks #8 of 113 boombox speakers by sound quality, rated 4.2/5, at $299.95. The W-King X20S ranks #30, rated 3.8/5, at $150.99, $148.96 cheaper, a saving that is not big enough to make up the sound-quality gap.
The JBL Partybox Encore Essential is the better-sounding choice. A compact stereo party speaker with great sound, strong output, and splash resistance for backyard parties.
The W-King X20S is the longer-running, tougher choice. A lighter, waterproof boombox with clear mids, plenty of volume, FM radio and a handle plus shoulder strap. It is rated for 24 hours of battery against 6 for the JBL Partybox Encore Essential. It is rated IPX7 against IPX4 for the JBL Partybox Encore Essential. The catch: Less bass and depth than the W-King X20 and about 3dB quieter, and at maximum volume its mids and highs start to drown out the bass.
Buy the JBL Partybox Encore Essential. It is rated higher for sound quality, and saving $148.96 with the W-King X20S does not make up for the sound-quality gap.
Want more options? Browse the full Portable Bluetooth rankings.
Prices on this page were last checked November 14, 2026 at 6:17 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| JBL Partybox Encore Essential | W-King X20S | |
|---|---|---|
| Price | $299.95 | $150.99 |
| Ranked | #8 of 113 in Boombox Size Portable Bluetooth Speakers | #30 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (JBL PartyBox app) | Yes (W-KING) |
| Aux Input | Yes | Yes |
| Aux Latency | 17ms | - |
| Bass Extension (-10dB) | 38Hz | - |
| Battery Life | 6 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | - |
| Built-in Microphone | No | Yes |
| EQ | Yes (3 band App EQ) | Yes |
| IP Rating | IPX4 | IPX7 |
| Bluetooth Latency | 100ms | - |
| Party Mode | Yes (PartyBoost up to 100 speakers) | - |
| Power Bank | Yes (USB-A, 5V/0.5A) | - |
| Power Input | AC Power cord | USB-C |
| Stereo | Yes | Partially |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 13 lbs (5.9 kg) | 13.8 lbs (6.25 kg) |
| Bluetooth Version | 5.1 | 5.4 |
| Amplifier Power | 100W RMS | 140W RMS (180W peak) |
| Dimensions | 10.9” x 12.9” x 11.5” (276 x 327 x 293 mm) | 7.6”H x 17.4”W x 9.4”D (192 x 442 x 240 mm) |
| Drivers | 135mm woofer + 2x 44mm tweeters | 1x 6.5” subwoofer, 2x 1.1” tweeters, 2x passive radiator |
| Maximum SPL | 110dB (measured by Alan Ross Reviews) | - |
| Digital Aux Input | No | - |
| Strap | No | Yes (detachable shoulder strap) |
| MicroSD Playback | - | Yes |
| FM Tuner | - | Yes |
Where the Ratings Come From
- JBL Partybox Encore Essential: reviews by Alan Ross, DLX Willington and Jay’s Straight Up Reviews & More.
- W-King X20S: reviews by Mateusz Cholewa and Jagist.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
Related Speaker Comparisons
More top alternatives to JBL Partybox Encore Essential: